IEC 62365:2009 specifies a means to carry multiple channels of audio in linear PCM or IEC 60958-4 format over an ATM layer service conforming to ITU-T Recommendation I.150. It includes a means to convey, between parties, information concerning the digital audio signal when setting up audio calls across the ATM network. This bilingual version (2012-08) corresponds to the monolingual English version, published in 2009. This second edition of IEC 62365 cancels and replaces the first edition published in 2004.The main changes with respect to the previous edition (2004) are: second, third, and fourth required formats in 4.3 removed. 4.3 reformatted, eliminating Table 2, and subsequent Tables renumbered.